after quick browsing the forum I didn't find specific hints so I like to ask with an own thread. If I oversaw information in the forum, I apologize and encourage you to point me to, many thanks in advance.

yes, this section exists in the startup-sequence. I commented it out and the emulation booted again. So as next I'll check more in detail if Picasso96 works. I thought the standard installation is ok, but it seems I need to modify a bit.

First of all the configuration only uses Z3 Fast RAM, and the VRAM was set to 16 MB (also tested 2 MB but this made no difference in the behavior). Then:

Test 1

followed BigFan's recommendation, commenting something out, but NOT using loadmondrvs. Therefore I doubleclicked on uaegfx in folder devs/monitors, then the screen became black for a couple of seconds, and I got a Guru Meditation. Afterwards the system restarted it went back to the standard.

Test 2

followed BigFan's recommendation, commenting something out, now using loadmondrvs in the startup-sequence. After starting the system the screen became black and nothing else happened, neither automatic restart nor Guru meditation.

i gave your playground settings a test run. works fine with wb 3.9 and p96 with uaegrfx.

there must be something missing or wrong with your p96 installation, i assume.

thx BigFan,

This is strange because I just used the latest Picasso96 installation (downloaded from the link in the 1st post). So I think I need to do it again. Does it maybe make sense to use an older Picasso version?

However many thanks for your try, so it must be something on my side.

I also followed Toni's advice with version 3.1 beta but this doesn't work as well. It's obvious after your discovery.

ah, i must second that. forgot to write that i've installed bb3 and 4 without crappy hacked libraries and rom-patches.
system is more close to bb2
no loadmodule entry in startup-seq, no rompatches loaded, no rom-modules excluded.

if you didn't already, start a new installation with BB1+2 , install p96. if it runs then, make a backup of your sys. i recommend using hardfiles rather than directories.

if you still dare, install BB3 + 4 carefully, (test each before continuing). but be warned: you might face more problems than you wished to solve.

I sure appreciate this information ^^^ I am back in to my classics again after some time away. Trying to build a current OS 3.X has been driving me nuts! Everything seems fine until I use either BB3+ or later, now I know

Is there a 3.9 installation guide with suggested upgrades and cautions about what to avoid, or is it trial and error? I am setting up several systems including an A4000D Mediator PCI system.

it works successfully now. Just following BigFan's advice NOT to install BoingBag3&4 :-). Picasso96 from AmigaOS3.9 CD is stable.

Amiga OS 3.9 on my flat screen 1920 x 1080 looks pretty good!

Thanks guys for your effort, I really appreciate.

No it's time for a backup and to continue with some other configuration enhancements:
- juggling with memory and performance
- UI improvements, especially backdrop to get rid of the rectangle
around icons, maybe GlowIcon or comparable...
- 68060 config
- PPC config (Amiga OS 4.1 FE is on the way...)
- and maybe WHDLoad (probably on another UAE configuration)